Authenticated code execution via cross-database JAR overwrite
Published Jan 22, 2024 · Updated Jun 20, 2025
Remote code execution in IBM Db2 10.5.0.x, 11.1.4.x, and 11.5.x allows remote authenticated users to run code through a malicious JAR. Db2 stores installed JARs under a schema-based path shared across databases, so a like-named JAR in one database overwrites the file used by another. Exploitation requires database credentials and an instance with multiple databases; the overwritten JAR executes in the affected server context.
Summary
What happened
Remote code execution in IBM Db2 10.5.0.x, 11.1.4.x, and 11.5.x allows remote authenticated users to run code through a malicious JAR. Db2 stores installed JARs under a schema-based path shared across databases, so a like-named JAR in one database overwrites the file used by another. Exploitation requires database credentials and an instance with multiple databases; the overwritten JAR executes in the affected server context.
The record
- CVE
- CVE-2023-27859
- Published
- Jan 22, 2024
- Updated
- Jun 20, 2025
- Vendor
- IBM
- Product
- IBM Db2 for Linux, UNIX, and Windows
- Classifications
- CWE-427, T1505
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 22, 2024CVE publishedPublication date reported by the CVE source.
- Jun 20, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=10.5, 11.1 ,11.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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